如何在sqlalchemy中通过'Email'过滤数据库？

Question

这是我尝试添加用户的实现。获取错误的部分是* args命令。链接到我的注册页面是here。

def addUser(self, session, *args, **kwargs):
        try:
            print person_models.Player
            print person_models.Player.Email
            existingPerson = session.query(person_models.Player).filter(person_models.Player.Email == args['Email']).first()
            print existingPerson
            if existingPerson is not None:
                return {'error':"User already exists"}
            print person_models
            print type(person_models)
            person_model = getattr(self, person_models)
            print person_model
            person = person_model(*args)
            session.add(person)
            session.commit()
            return {"response": "User added"}
        except Exception as e:
            return {'error':str(e)}

我的目标是以下一行

existingPerson = session.query(person_models.Player).filter(person_models.Player.Email == args['Email']).first()

是检查电子邮件是否已经存在，如果是，则说“嘿，这封电子邮件已经存在！”

这是我的帖子功能

    @jsonDbRest
   def POST(self, *args, **kwargs):
      session = cherrypy.request.db
      print session
      pc = PersonController()
      print pc
      response = pc.addUser(session, *args, **kwargs)
      return {"results": response} 

这是我的My model.py

from sqlalchemy import Column,String,VARCHAR,NUMERIC,INTEGER,ForeignKey,Boolean,DateTime,FLOAT
from sqlalchemy.orm import relationship
from sqlalchemy import event
from sqlalchemy.orm import validates
import time
import datetime
import uuid
from db import JsonBase
#Local imports

def time_mills_int():
    return int(time.time()*1000)

class Player(JsonBase):


    def __init__(self,*args,**kwargs):
        super(Player,self).__init__(*args,**kwargs)

    __tablename__ = 'Player'
    Address = Column(String(255))
    Citizenship = Column(String(50))
    Committed = Column(String(255))
    CountryPlayingIn = Column(String(50))
    DateOfBirth = Column(DateTime)
    Email = Column(String(255), primary_key=True)
    EmailConfidential = Column(INTEGER())
    FieldOfStudy = Column(String(255))
    Gender = Column(String(1))
    Graduation = Column(String(15))
    Level = Column(String(15))
    Links = Column(String(255))
    Name = Column(String(50))
    ParentApproval = Column(INTEGER())
    Password = Column(String(100), nullable=False)
    PhoneNumber = Column(String(30))
    priPosition = Column(String(30))
    secPosition = Column(String(30))
    Sport = Column(String(25))
    Views = Column(String(255))
    Videos = Column(String(255))
    ACT = Column(String(15))
    GPA = Column(FLOAT())
    SAT = Column(String(15))
    TOEFL = Column(String(15))

    __mapper_args__={
       'polymorphic_identity':'Player'
    }


    class Coach(JsonBase):

    def __init__(self,*args,**kwargs):
        super(Coach,self).__init__(*args,**kwargs)

    __tablename__ = 'Coach'
    Address = Column(String(255))
    Citizenship = Column(String(50), nullable=False)
    DateOfBirth = Column(DateTime, nullable=False)
    Email = Column(String(255), primary_key=True)
    EmailConfidential = Column(INTEGER(), nullable=False)
    Gender = Column(String(1), nullable=False)
    Name = Column(String(50), nullable=False)
    Password = Column(String(100), nullable=False)
    PhoneNumber = Column(String(30), nullable=False)
    Sport = Column(String(25))
    Verified = Column(INTEGER(), nullable=False)
    Views = Column(String(255))

    __mapper_args__={
      'polymorphic_identity':'Coach'
    }

这是我的jsonDbRest（func）

import cherrypy
import json
from engine import create_session

def jsonDbRest(func):
   def wrapper(self, *args, **kwargs):

      cherrypy.request.db = create_session()

      if 'Content-Length' in cherrypy.request.headers:
         length = cherrypy.request.headers['Content-Length']
         bodytext = cherrypy.request.body.fp.read(int(length))
      else:
         bodytext = ""
      if bodytext != "":
         jsonData = json.loads(bodytext)
      else:
         jsonData = None
      cherrypy.request.json = jsonData
      func_data = func(self, *args, **kwargs)
      data = {"method":func.__name__, "input":jsonData,"kwargs":kwargs}
      if func_data is not None:
         data.update(func_data)
      cherrypy.response.headers['Content-Type'] = 'application/json'
      if "error" in data:
         cherrypy.response.status = "400"
      else:
         cherrypy.response.status = "200"
      cherrypy.request.db.close()
      return json.dumps(data, indent=4)

   return wrapper